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  2. Permit-to-work - Wikipedia

    en.wikipedia.org/wiki/Permit-to-work

    Permit-to-work adherence is essential in process safety management. Examples of high-risk jobs where a written permit-to-work procedure may need to be used include hot work (such as welding), confined space entry , cutting into pipes carrying hazardous substances (breaking containment), diving in the vicinity of intake openings, and work that ...

  3. Confined space - Wikipedia

    en.wikipedia.org/wiki/Confined_space

    A confined space is a space with limited entry and egress and not suitable for human inhabitants. Alternative names for a confined space are enclosed space and dangerous space. [ 1 ] An example is the interior of a storage tank , occasionally entered by maintenance workers but not intended for human occupancy.

  4. Physical hazard - Wikipedia

    en.wikipedia.org/wiki/Physical_hazard

    Confined spaces also present a work hazard. The National Institute for Occupational Safety and Health (NIOSH) defines "confined space" as having limited openings for entry and exit and unfavorable natural ventilation, and which is not intended for continuous employee occupancy.

  5. Asphyxiant gas - Wikipedia

    en.wikipedia.org/wiki/Asphyxiant_gas

    Confined spaces, combined with accidental gas leaks, such as mines, [1] submarines, [2] [3] refrigerators, [4] or other confined spaces [5] Fire extinguisher systems that flood spaces with inert gases , such as computer data centers and sealed vaults [ 4 ]

  6. Concentrated animal feeding operation - Wikipedia

    en.wikipedia.org/wiki/Concentrated_animal...

    Smithfield Foods hog CAFO, Unionville, Missouri, 2013. In animal husbandry, a concentrated animal feeding operation (CAFO), as defined by the United States Department of Agriculture (USDA), is an intensive animal feeding operation (AFO) in which over 1,000 animal units are confined for over 45 days a year.

  7. Claustrophobia - Wikipedia

    en.wikipedia.org/wiki/Claustrophobia

    Other forms of treatment that have also been shown to be reasonably effective are psychoeducation, counter-conditioning, regressive hypnotherapy and breathing re-training. Medications often prescribed to help treat claustrophobia include anti-depressants and beta-blockers, which help to relieve the heart-pounding symptoms often associated with ...

  8. Self-contained breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/Self-contained_breathing...

    A self-contained breathing apparatus (SCBA) is a respirator worn to provide an autonomous supply of breathable gas in an atmosphere that is immediately dangerous to life or health from a gas cylinder. [1]

  9. Caisson (engineering) - Wikipedia

    en.wikipedia.org/wiki/Caisson_(engineering)

    Schematic cross section of a pressurized caisson. In geotechnical engineering, a caisson (/ ˈ k eɪ s ən,-s ɒ n /; borrowed from French caisson 'box', from Italian cassone 'large box', an augmentative of cassa) is a watertight retaining structure [1] used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, [2] or for the repair of ships.